Cellulose ether yog cov khoom siv hluavtaws tau los ntawm cov xov tooj ntawm lub ntsej muag los ntawm kev hloov kho tshuaj lom neeg. Cellulose ether yog ib qho tseem ceeb ntawm cov cellulose ntuj. Kev tsim cov cellulose ether yog qhov sib txawv los ntawm cov hluavtaws polymers. Nws cov khoom siv tshaj plaws yog cellulose, lub ntuj polymer compound. Vim muaj tshwj xeeb ntawm lub ntuj cellulose qauv, lub cellulose nws tus kheej tsis muaj peev xwm ua kom muaj peev xwm tawm tsam nrog etherification tus sawv cev. Txawm li cas los xij, tom qab kev kho mob ntawm ofing tus neeg sawv cev, cov saw hlau muaj zog los ntawm cov pawg molecular thiab cov koom tes nquag tso tawm, thiab cov pab pawg ua kom nquag plias ntawm cov pab pawg hydroxyl dhau los ua cov alkali cellulose. Muab cov cellulose ether.
Cov yam ntxwv ntawm Cellulose cov neeg muaj kev pab yog nyob ntawm hom, tus lej thiab xa tawm ntawm cov neeg hloov chaw. Kev faib tawm ntawm cellulose ether kuj tseem tau ua raws li cov hloov chaw, qib kaum thiab muaj feem xyuam kev thov cov khoom thov. Raws li hom kev hloov chaw ntawm cov molecular, nws tuaj yeem faib ua monoet thiab sib xyaw ether. Lub MC peb ib txwm siv yog monoethers, thiab HPMC yog sib xyaw ether. Methyl Cellulose ether mc yog cov khoom tom qab cov pab pawg hydluce Nws yog cov khoom tau los ntawm kev hloov chaw ib feem ntawm cov pab pawg hydroxyl ntawm chav ntsuas nrog pawg methoxy thiab lwm feem nrog cov pab pawg hydroxyprropyl. Cov qauv txheej txheem yog [C6h7o2 (Oh) 3-MN (OCH3) M [OCH2CH (OH) METC, cov no yog cov ntau ntau dav siv thiab muag hauv khw.
Hais txog solubility, nws tuaj yeem faib ua ionic thiab tsis yog ionic. Dej-soluble tsis yog-ionic cellulose cov neeg muaj cai yog tsuas yog suav nrog ob sab ntawm Alkyl uas muaj cov neeg txawj ntse thiab Hydroxyalkyl cov neeg txawj ntse. Ionic CMC feem ntau yog siv nyob rau hauv cov khoom siv hluavtaws, textile luam ntawv thiab tawg thiab roj roj. Tsis yog-ionic mc, HPMC, Hemm, thiab lwm yam, siv tshuaj, dej txhua hnub, stabilizer, dispersant thiab ua yeeb yam disping tus neeg sawv cev.
Cov cim kev ua tau zoo ntawm cellulose ether:
Cov nyhuv ntawm mexoxyl cov ntsiab lus ntawm qhov zoo: dej ceev ceev thiab thickening muaj nuj nqi
Qhov zoo ntawm hydroxyethoyl / hydroxypropoxyl cov ntsiab lus: lub siab dua cov ntsiab lus, qhov zoo dua cov dej khaws cia.
Cawv ntawm viscosity zoo: qib siab dua ntawm polymerization, ntau dua cov viscosity thiab zoo dua cov dej khaws cia.
Cov cawv ntawm cov khoom zoo kawg nkaus: tus finer qhov kev faib tawm thiab kev sib tov, cov kev sib dhos sai dua thiab ntau dua yog, thiab cov txheeb ze kom rov qab ua haujlwm zoo dua
Kev tshwm sim zoo ntawm lub teeb rau kev sib txuas lus: cov qib siab ntawm polymerization, ntau dua cov qib polymerization, thiab cov tsis muaj zog tsawg
Gel qhov kub ua tau zoo: Cov pa taws kub rau kev tsim kho yog ib ncig 75 ° C
Cawv ntawm cov dej zoo: <5%, cellulose ether yog yooj yim nqus dej noo, yog li nws yuav tsum tau muab ntim thiab khaws cia
Tshauv Qhov Cuam Tshuam: <3%, qhov siab dua cov tshauv, qhov ntau impurities
PH nqis rau qhov cuam tshuam: ze rau ntawm nruab nrab, cellulose ether muaj kev ua tau ruaj khov nyob hauv Ph: 2-11
Lub Sijhawm Post: Feb-14-2023